title: The Snoopy sign.
authors.affiliation: Department of Cardiothoracic Surgery and Transplantation, Papworth Hospital, Cambridge, UK.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Panagiotopoulos
authors.forename: James
authors.initials: J
authors.lastname: Barnard
authors.forename: Francis
authors.initials: F
authors.lastname: Wells
mesh_terms: D006801:Humans; D008482:Mediastinum / Q000002:abnormalities*; D010496:Pericardium / Q000002:abnormalities*; D013902:Radiography, Thoracic
keywords: Cardiac; Congenital; Mediastinum absence